Hale to martin m



(Model.)

0. E. LEE.

PERMUTATION LOOK. No. 275,673. Patented Apr. 10,1883.

I'm PETERS Pholo-Lilhugmphu. Washingmn D c UNITED STATES PATENT OFFICE.

CHARLES E. LEE, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR ONE- HALF TO MARTIN M. HOUCK, OF SAME PLACE.

PERMUTATlON-LOCK.

SPECIFICATION forming part of Letters Patent No. 275,673, dated April 10, 1883.

Application filed December 1, 1882. (ModeL) T all whom it may concern Be it known that I, CHARLES E. LEE, of New Britain, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Dial-Locks, of which the following is a specification.

My invention relates to improvements in dial-locks; and the objects of my improvements are to produce a secure lock which is of simple construction and inexpensive to make. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure l is a front elevation of my lock. Fig. 2 is a rear elevation of the main parts thereof. Fig. 3 is a front elevation of the spring-bolt thereof, the parts shown in Fig. 2

having been removed from the front thereof.

Fig. 4 is a sectional view, partly in elevation, on line as a: of Fig. 2; and Fig. 5 is like view of the complete lock on line y 3 of Fig. '1.

The keeper A and spring-bolt B may be of any ordinary construction. I provide said bolt with an arm, a, by means of which it may be pushed back against the power of the spring I) to disengage the keeper. These parts are attached to the lock-plate C and are covered by the case D. Upon the front of the case D are two knobs or handles, 0 d, the handle a being secured to the outer end of the shaft E. This shaft is supported at its inner end by the bridge 0, and at its outer end by the secondary case or box, F, upon the front of the case D. A spiral spring, f, surrounds the shaftE at a point between the front of the box F and the collar g, which is rigidly secured to said shaft, the spring having a tendency to hold the shaft endwise into the position shown in Fig. 4. An arm, h, projects from the shaft E at a point near the bridge 0, as shown in Fig. 4, and another arm, '5, Fig. 2, projects from said shaft near its inner end. Two slots, is and l, are formed in the bridge, as shown in Fig. 2, for a purpose hereinafter explained. The knob 01'' handle dis connected to thenotched disk G by a screw, m, which takes into the shank of the knob, said disk and knob being supported so as to rotate in the case.

Upon the front of the case there are two dials, n n, Fig. 1, and each knob or handle may be provided with a suitableindex mark or pointer.

To look the parts it isonly necessary to turn the disk so that its notch does not register with the slot 70 of the bridge 0.

To unlock the parts the knob or handle d is turned to that point on the dial according to previous arrangement-as, for instance, to the figure 4-which indicates that the notch in the disk registers with the slot to in the bridge. The handle 0 is then turned-as, for instance, to the figure 7-until, in like manner, the dial indicates that the arm h of the shaft also registers with the slot'k in the bridge. The knob c and its shaftE may then be pulled outward until the arm passes through the bridge, when it is partially rotated to carry the arm under the bridge. This longitudinal movement of the shaft draws the arm t to the front far enough to bring it directly in front of the arm a of the bolt B. In rotating the shaft E far enough to carry the arm h under the bridge e from the slot k to the slot 1, the arm '5 will engage the arm act the bolt and withdraw said bolt from its keeper. The

spring then throws the shaft inward to its normal position, so that upon further rotation of the shaft E the arm 1' passesjust behind or back of the arm a without engagement therewith until the knob and shaft are again pulled out far enough to carry the arm h under the bridge. The arm h is so long that it cannot pass into the slot la except when the notch in the disk G registers therewith.

The screw or may be loosened in order to change the position of the disk G upon its knob. Other means of a more complicated nature may be employed, if desired, for securing and rotating the disk, so as to multiply the changes that may be made therein. The disk G is set in substantially the same plane as the bridge 0.

I claim as my invention- 1. The combination ofthe rotary and notched disk having a suitable operating knob or handle, the bridge having the slot 70, and the shaft E, having arms h i and operating knob or handle, said shaft having both a rotary and longitudinal movement, substantially as described, and for the purpose specified.

2. In a lock, the combination of the sliding bolt B, having arm a, the shaftE, having arms 1' and h, the slotted bridge 0, the sprin g f, and knob c, substantially as described, and for the purpose specified.

- CHARLES E. LEE.

Witnesses:

JAMES SHEPARD, MARTIN M. HoUoK. 

